HIGH 7.5 Microsoft

CVE-2026-34183

Unbounded Memory Growth in the QUIC PATH_CHALLENGE Handler

Microsoft Security Update 2026-Jun: Unbounded Memory Growth in the QUIC PATH_CHALLENGE Handler

Affected Products

azl3 cloud-hypervisor 51.1.56-1 on Azure Linux 3.0
azl3 nodejs 24.14.1-3 on Azure Linux 3.0
azl3 openssl 3.3.5-5 on Azure Linux 3.0
azl3 rust 1.75.0-29 on Azure Linux 3.0
azl3 rust 1.90.0-8 on Azure Linux 3.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34183
https://nvd.nist.gov/vuln/detail/CVE-2026-34183

Published: 2026-06-09 · Source: Microsoft · Feed updated: 2026-08-04

This high severity vulnerability with a CVSS score of 7.5 was published on 2026-06-09 via Microsoft. Affected: azl3 cloud-hypervisor 51.1.56-1 on Azure Linux 3.0, azl3 nodejs 24.14.1-3 on Azure Linux 3.0, azl3 openssl 3.3.5-5 on Azure Linux 3.0 and 2 more.

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